A Slaughtermaster with a Great Mawpot receives a Ward Save (4+) and +1 to cast spells. In addition, he may add 6" to the range of any spell he attempts to cast and his Inspiring Presence ability.
Source: Warhammer Armies Project: Unofficial 9th Edition (v2.2)
A Slaughtermaster with a Great Mawpot receives a Ward Save (4+) and +1 to cast spells. In addition, he may add 6" to the range of any spell he attempts to cast and his Inspiring Presence ability.